JVM quick start

1. JVM exploration? Several interview questions: 1. Would you please talk about your understanding of jvm? Java 8 virtual machine and previous changes update? 2. What is oom? What is stack overflow? How to analyze? 3. What are the common tuning parameters for the jvm? 4. How to capture memory snapshots and analyze Dump files? 5. What ...

Posted on Mon, 06 Dec 2021 15:16:03 -0500 by Im Jake

Classic of operating system | producer and consumer problems

1, Overview of producer consumer issues Description: two or more threads share the same buffer. One or more threads as a "producer" will constantly add data to the buffer, and the other or more threads as a "consumer" will take data from the buffer. Note the following: Producers and consumers must use buffers that ar ...

Posted on Sun, 05 Dec 2021 13:33:42 -0500 by gingerboy101

rocketmq transaction message

The transaction message of rocketmq is used as a solution to distributed transactions on some occasions. Today, let's analyze the transaction message of rocketmq catalogue 1. Transaction message flow process 2. The producer sends a transaction message (half message) 3. The broker handles the half message 4. The producer executes a local tr ...

Posted on Sat, 04 Dec 2021 21:41:55 -0500 by sawade

Maven, Redis, and Kafka installation and configuration

Maven installation and configuration 1, Download and install go to https://Download the latest version of Maven at maven.apache.org/download.cgi 2, Custom storage directory Extract the file to D:\Program Files\Apache\maven directory 3, Environment variable configuration New environment variable MAVEN_HOME, assignment D:\Program Files\A ...

Posted on Mon, 29 Nov 2021 03:57:45 -0500 by Sarok

Kafka Stream(KStream) vs Apache Flink

The original text is translated from DZone and translated freely according to the original text.Tencent cloud flow computing Oceanus is a powerful tool for real-time analysis of big data and is compatible with Apache Flink application. New users can 1 yuan purchase flow calculation Oceanus(Flink) cluster , readers are welcome to experience it. ...

Posted on Sat, 27 Nov 2021 23:56:32 -0500 by jf3000

SpringBoot integrates ES advanced query

SpringBoot integrates ES advanced query springboot version: 2.0.5.RELEASE elasticsearch version: 7.9.1 1. Disposition Import dependency: <dependency> <groupId>org.elasticsearch.client</groupId> <artifactId>elasticsearch-rest-high-level-client</artifactId> <version>7.9.1</version> </d ...

Posted on Fri, 26 Nov 2021 11:07:31 -0500 by balkar

@LoadBalanced annotation principle

Integrating Ribbon with RestTemplate Spring provides a simple and convenient template class for API calls, that is, RestTemplate. 1. Use RestTemplate When we introduced Eureka earlier, we have already used RestTemplate. This section will explain how to use RestTemplate in more detail. First, let's take a look at the use of GET requests: crea ...

Posted on Tue, 23 Nov 2021 05:54:00 -0500 by V0oD0o

18_ View theme - modify theme - delete theme

1 view topics The kafka-topics.bat script has five instruction types: create, list, describe, alter, and delete. The list and describe instructions can be used to easily view the topic information. We have touched on the usage of the describe instruction in the previous content, which will be described in more detail in this section. You can ...

Posted on Tue, 23 Nov 2021 03:34:42 -0500 by watson516

Spark phase summary

Kafka kafka consumption data At the same time, the data in kafka can only be consumed by one consumer under one consumer group. kafka consumers are grouped when they consume data. The consumption of different groups is not affected. For the consumption in the same group, it should be noted that if there are 3 partitions and 3 consumers, t ...

Posted on Wed, 17 Nov 2021 11:07:48 -0500 by Cantaloupe

Kafka producer - concept overview | configuration parameters | serialization | partition -- Notes on Kafka authoritative guide

Kafka producer - writes data to Kafka In addition to the built-in client, Kafka also provides a binary connection protocol, that is, we can read messages from or write messages to Kafka by directly sending appropriate byte sequences to the Kafka network port. Therefore, there are many Kafka clients implemented in languages, such as C + +, ...

Posted on Wed, 17 Nov 2021 06:01:27 -0500 by sysgenmedia